PhD Pro Endurance Print

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Product Overview

Smartwool asked pro athlete, Rob Krar, to help us create the ultimate running  sock based on his experiences and insights. This purpose-built sock  features Shred Shield™ technology to reduce wear from toes,  activity-specific minimal and targeted sole cushioning, and a new  malleolus ankle cushion designed for protection on the most rugged  trails. With a colorful mountain design, you'll be running your best and  looking your best, too.



  • Sock Height: Crew
  • Rob Krar signature sock
  • Minimal and targeted sole cushion; Achilles heel cushion
  • Malleolus ankle cushion for protection on the most rugged trails
  • Virtually Seamless™ toe for enhanced comfort
  • 7.5" overall height
  • 360° print technology
  • Made in USA of Imported Yarns: 57% Merino Wool, 38% Nylon, 4% Elastane, 1% Polyester


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